Use “P” to print out the current disklabel.
Using the printouts from step ONE – I had to delete partitions wd0b, wd0e, wd0f and wd0g.
Type “b”. Then type “unused”, then “0″, “0″.
Type “e”. Then type “unused”, then “0″, “0″.
Type “f”. Then type “unused”, then “0″, “0″.
Type “g”. Then type “unused”, then “0″, “0″.
This will select each label entry, set it unused, and init the values to “0″.
If you type “P” again you’ll see the disklabels have been deleted.
Create a new disklabel for the CGD. I used “wd0e”.
Type “e”, then “ccd”, then “a”, then “$”. This will create a label for wd0e which starts after the root label (wd0a) and uses the remaining space.
Type “P” again to make sure everything is correct. When happy “W” then “Q” to exit.

Of course, at this stage only "/bin" and "/sbin" are available - which means no "vi" or "ssh".

Ashamed of my "ed" line editor skillset - I wrote those files while ssh'd into the OpenBSD server via a laptop. I used "rcp" to ferry them back onto the NetBSD box. The broadband modem was casually switched off at this stage.